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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2013, Vol. 14 Issue (5): 353-361    DOI: 10.1631/jzus.A1200306
Civil Engineering     
Canonical correlation analysis of hydrological response and soil erosion under moving rainfall
Qi-hua Ran, Zhi-nan Shi, Yue-ping Xu
Institute of Hydrology and Water Resources, Zhejiang University, Hangzhou 310058, China
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Abstract  The impacts of rainfall direction on the degree of hydrological response to rainfall properties were investigated using comparative rainfall-runoff experiments on a small-scale slope (4 m×1 m), as well as canonical correlation analysis (CCA). The results of the CCA, based on the observed data showed that, under conditions of both upstream and downstream rainfall movements, the hydrological process can be divided into instantaneous and cumulative responses, for which the driving forces are rainfall intensity and total rainfall, and coupling with splash erosion and wash erosion, respectively. The response of peak runoff (Pr) to intensity-dominated rainfall action appeared to be the most significant, and also runoff (R) to rainfall-dominated action, both for upstream- and downstream-moving conditions. Furthermore, the responses of sediment erosion in downstream-moving condition were more significant than those in upstream-moving condition. This study indicated that a CCA between rainfall and hydrological characteristics is effective for further exploring the rainfall-runoff-erosion mechanism under conditions of moving rainfall, especially for the downstream movement condition.

Key words： Moving rainfall      Runoff      Sediment erosion      Canonical correlation analysis (CCA)     
Received: 16 November 2012      Published: 30 April 2013
CLC:  TV11  
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Qi-hua Ran, Zhi-nan Shi, Yue-ping Xu. Canonical correlation analysis of hydrological response and soil erosion under moving rainfall. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2013, 14(5): 353-361.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A1200306     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2013/V14/I5/353

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